Question

On a piece of paper, use a protractor to construct a triangle with angle measures of 40° and 60?. What is the measure of the third angle?

Answer 1

80°

Explanation:

The sum of the angles of any triangle must add up to 180°. If you form a triangle with an angle of 40° and another angle of 60°, the sum of those two angles is 40 + 60 = 100, so the measure of the third angle: 180 - 100 = 80°.